Fluid-pressure-operated motor



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mi s 2 J. K. HARFORD FLUID PRESSURE OPERATED KOTOR F11ed Dec 18, 1928 Aug; A'13.2, 1930.

l0/#J /f HAR/"09D Inventor Aug. 12, 1930. l f .1. K. HARr-'oRD 1,772,578

will) PRESSURE OPERATED uo''on Filed Dec. 18. 1928 2 Sheets-Sheet 2 Attorney Patented' Aug. 12, 1930 f UNITEDSTATES JOHN K. HARFOD, 0F LEWISTON, IDAHO FLUID-PRESSURE-OPERATED MOTOR d `Application led December 18, 1928,.'7d7Seria1rNo. 326,777.

the construction of Vconcrete andcement streets and roads,Y as is well known, it is desii-able and necessary that the completed way.

be sprinkled at intervals with water to insure the proper completion of the roadway or y street before it is used for traflic.

The motor of my invention contemplates the employment of a fluid operated device or apparatus having a main pipe that is `attached to the water supply system to Vreceive its supply Vof water', 'and a system of distributing pipes with sprinkling nozzles is also attached to the apparatus. The distributing nozzles may be located at Lpoints along'thetfinished street surface so that the entire surfacemay be sprinkled simultaneously and atV regular and uniform intervals asdesirable orgnecessary, and means arefprovidedlin themotor apparatus for :automatically 'opening and closing a main control valve that governs the flow of water from the supply system to the sprinkling system. i

The motor is of thattype using-a cylinder `and water operated piston, the water being supplied to the `motor under pressure from the street main, and the main valve, together With otherjvalves necessary 4for'the operation of theimechanism are operated by mechanisms actuated from the stem of the piston. -The invention consists in certain novel combinations and arrangements ofparts as will vhereinafter be more fully set forth and claimed. l d l In the accompanying drawings I have illustrated one' completefexam'ple' ofthe physical embodiment of'mvv inventionfwherein the parts are combined and arran ed according'to thebestmode-` I have thus ar devised for the practical application ofthe principles of my inventiomand'` which embodiment has been successfullyroperated. Variouschanges and' alterations within the scope of my claims may be made .in the exemplified structure, and the motor and connections may be adapted for various other uses. f

Figurel is a View in side elevation of an appliance embodying my invention,` the P ATENToFl-ICE parts being shown in position with the main p controlvalve open, and in dotted lines showing some parts in closed position.

Figure 2 is a view in elevation as seen 4from the left in Figure 15with dotted lines showing some of the parts in closed positionfor the main valve. f

Figure 3visa sectional detail yiew of the-` cylinder and its plunger or piston. l Y

Inl carryingv out my invention I utilize a main pipe 1 of suitable diameter and length,

j which is provided at one end with a coupling 2 that is attached to the usual water supply "pipe, and at its opposite end this pipe is pro- -vided with a faucet?V and threaded nipple 4.

Bymeans of a h'oseand coupling the nipple 4 islconnected' tothe street sprinking pipesyand 4the latter are provided with thezsprinklers distributedk at regular. intervals, or wherede-V -sired,for sprinkling water to the work. l

`Ane-upright cylinder 5supported on legsor feet ri's utilized asthewater pressure chamber, and a main supply or control valve 7 vis .interposed in the pipe 1, and periodically opened and closed by mechanism operated fromv movement ofthe piston or plunger 9 in A 1 Figure 4 is a perspective view ofthe appli` ance. Y

the cylinder' or reservoir. "The piston `is adapted to reciprocate under water pressure in the ,reservoir or cylinder, and the supply valve 7 remains open for rflowv of Water through pipey 1 while the piston is rising and remains in uplifted position of Figure 3. When pressure of water is released from the under side of the pistonand applied at the upperside of the piston, the latter falls, and duringthe descent of the 4piston the main supply valve 7 is closed,` A by-pass pipe8 is connectedtothe lower Vend of the cylinder.

The piston hasan upright stem 10 proj ect-` ing through a stufling'or packing box llat the top of the cylinder, and a piston rod V13 is rigidly connected with the stem by a bracket 14 at the complementary upper ends of the stem and rod. Therod extends downwardly exterior of the cylinder and is adapted to reciprocate in the guide brackets lsupported from the cylinder near the upper and lower endsl thereof, and of course the rigid stem and rod ascend and descend in unison.

A bracket 15 is fixed at the top of the cylins der and projects thereabove for the support of a floating link 16 that is pivoted at 17 in the upper end of the bracket, and this {loating lever or link is designed Ato swing in a vertical plane on its pivot as indicated by dotted lines and full lines in Figure 1. At the free,'outer end of the Heating link an upright lever 18 is pivoted, and a snap spring 19 is suspended between the piston rod and the free end of the link. It will be apparent that as the rod rises and falls it carries with it they spring, and as the rod-end of the spring passes the pivot 17 a snap action is given to the floating link 16 to raise or lower it This Snap movement is imparted to the valve lever 18, and the latter is pivoted at the free end of a valvelever arm 20, which at 21 is pivoted vt the main supply valve 7 for opening and closing the valve.

The range of the opening and closing move- .m5 ments of the lever arm 20 is indicated by dotted and full lines in Figure 2, the valve vopen for' the iow of water when the lever arm is up, and closed against llow of water whenthe leverarm is snapped by the `$0 spring action down to dotted position.

water is cut oli' by the closing ofthe main valve 7. i i

` For the'operation `of. the drain valve 22 a link ,23 is pivoted on the lever arm of the main valve, and the link 23 is pivoted at the free end of the drain-valve lever arm 24 which is connected to the rotary stem 25 of the drain valve for operating the latter.

A water pressure pipe 26 extends from the main pipe 1 behind the main valve to the upper portion of the cylinder and enters the cylinder above vthe piston 9 for supplying water pressure onthe piston to force it downwardly to initiate the closing movement of the main valve 7. This water pipe also has a valve as 27 that is automatically opened and closed through power transmitted from the moving piston rod 13 and valve operating lever 18, through the valve lever arm 20. When the main valve is closed this control valve-27 is also closed, and of course both valves are simultaneously opened, the control valve being actuated from the lever arm 20 by means of lever arm 28 and link 29, the latter closed.

Assuming the street is to be sprinkled at predetermined half-hour intervals for sprinkling periods of say five minutes, the

.regulating V`valve or time valve 30 is set to permit `low oaf such a `quantity and pressure of water throughpipe 8 as will lift the piston in `ahalf hour, and the regulating valve 31 is set to permit flow of Water for five minutes while the cylinder is ,drainin from below the piston. 4The main valve is thus opened and remains opened for live minute intervals at `the end of every half hour period of time.

When the piston reaches the upper end of its stroke the spring 19 is snapped and the main valve is closed; drain valve 22 is opened to drain the water from `the cylinder past the main valve or in front of it; and control valve 27 is opened back ofthe main `valve to permit water pressure to flow into the top of the cylinder for lowering the piston. At the lower end .of the piston stroke the positions of the` automatically operated valves are changed by the spring action, and these successive actions ta e p ace as lon as the pressure existsin the main pipe 1 of t e appliance.

. Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is- 1. In a -fluid pressure operated sprinklin system the combination with a main pipe and af supply valve therein, of a cylinder and plston therein, pressure pipes from the main pipe to the cylinder at opposite sides of the piston and control valves 1n said pipes, operatlng mechanism for the su ply valve connected to and operating with t e reciprocating movement o the piston, and valve operating mechanism for the` control valves actuated by the first valve-operating mechanism- 2. In a fluid pressure operated sprinkling system, the combination with a main pipe and a supply valve therein, of a cylinder and reclprocating piston, pressure pipes connectmg the main pipe at opposite sides of the main valve with the ends of the cylinder,

1n... Amc

necting the main pipe at opposite sides ofthe main valve with the ends of the c. linder, valves for regulating. the How o water through said pressure pipes, control valves in the pressure pipes, and operating mechanism actuated from the piston for Said main valve and control valves.

4. In a fluid pressure operated sprinkling system, the combination with a main pipe and its Valve and a pressure-operated reciprocable member, of a valve'lever and lever arm and a floating link connected with the valve lever, and a snap spring connecting said member and the free end of the link, for

the purpose described.

5. In a fluid pressure operated sprinkling system, the combination with a main pipe and its su ply valve, a cylinder and piston therein, o Water pressure ipes connecting the main pipe at opposite sldes of the'valve with the ends of the piston, control valves and manually operated regulating valves for said Water pipes, a piston stem and pistonr rod rigid with the piston, a floating link having a pivotal support andra snap spring connecting the free end of the link wlth the rod, andv valve operating mechanisms for the main valve and control valves connected with the link. Y

In testimony whereof I ailix myy signature. A

JOHN K. HARFORD. 

